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https://bugzilla.mozilla.org/show_bug.cgi?id=677638
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  <meta charset="utf-8">
  <title>Test for Bug 677638 - basic support</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
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  <iframe name="x" id="x"></iframe>
  <iframe name="y" id="y"></iframe>
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<pre id="test">
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  <script type="application/javascript">

  var tests = [ 0, 3 ];

  function runTests() {
    if (!tests.length) {
      SimpleTest.finish();
      return;
    }

    var a = new Worker('worker_messageChannel.js');
    a.onmessage = function(evt) {
      if (evt.data.type == 'finish') {
        runTests();
      } else if (evt.data.type == 'info') {
        info(evt.data.message);
      } else if (evt.data.type == 'check') {
        ok(evt.data.check, evt.data.message);
      } else if (evt.data.type == 'port') {
        is(evt.ports.length, 1, "A port has been received!");
        evt.ports[0].onmessage = function(e) {
          e.target.postMessage(e.data);
        }
      } else if (evt.data.type == 'newport') {
        var ch = new MessageChannel();
        ok(ch, "MessageChannel created");
        ch.port1.postMessage(42);
        a.postMessage('a gift!', [ch.port2]);
      }
    }

    a.postMessage(tests.shift());
  }

  SimpleTest.waitForExplicitFinish();
  runTests();
  </script>
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